How to identify a "raw" zone file

Chris Thompson cet1 at
Fri Dec 2 12:54:13 UTC 2011

On Dec 1 2011, Evan Hunt wrote:

>> I've looked at a few of them, and I noticed that all the ones I've seen
>> start with the four-octet string "00 00 00 02".  Is that sufficient?
>I'd recommend checking the next four octets as well; they'll be "00 00 00 00"
>or "00 00 00 01".  The first of those is the format that's always been used
>up to now; the second is the format that will be used in 9.9.0, starting
>with the next beta.

Ho hum... does this mean that if one has been running a 9.9.0b(next) or later
and let it generate master files in the new raw format (e.g. as a result
of dynamic updates), then one would have a problem backing off to earlier
BIND versions?

Chris Thompson
Email: cet1 at

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